Heel-routing machine



Nov. 27, 1928. 1,692,912

P. J. WENTWORTH HEEL RoUTiNG MACHINE Filed Dec. 21, 1926 2 Sheets-Sheet 1 $513 Wd atroz/nawa- Nov. 27, 1928.

1,692,912 P. J. wENTwoRTH HEEL ROUTING MACHINE 2 sheets-sheet 2 Filed Dec. 21, 1926 Patented Nov. 27, 1928.

UNITED STATES PEARL J'. WENTWORTH, OF FORT THOMAS, KENTUCKY.

' HEnL-noU'JING MACHINE.

Application filed December 21, 1926. Serial No. 156,207.

The invention relates to a. machine for routing the upper or top surface of a wooden heel for shoes to form a` recess or socket therein for making a keyed connection with the heel portion of the outer sole yor heel seat of the 5 tion of the table and cut-ter.

Another obj ect of the invention is to provide a guiding instrumentality comprising a pair of adj acently disposed rollers adj ust-able as a unit toward and from the routing cutter l0 and against which the work is engaged to direct the work for routing its surface to a p attern corresponding to the outline of the work and at a definite degree from the edge which contacts the roller to provide an appropriate 5 surface margin about the routing and which may be varied by adjusting the roller, the guide enabling the work to be quickly machined to a definite measurement and design.

Further features and advantages of the invention will be more fully set forth in the description of the accompanying drawings, in which:

Figure 1 is a side elevation of the machine with the base or frame shown partly in section to illustrate the belt transmission for driving the spindle housed within the frame.

Figure 2 is an enlarged top plan view of the same with the rear portion of the frame vshown in section.

Figure 3 is a section on line 3 3, Figure 2.

Figure 4L is a section on line it-4i, Figure 2.

Figure 5 is a side view of the routing tool.

Figure 6 is a perspective view of a wooden heel for shoes illustrating the work formed by the machine.

Referring to the drawings, 1 indicates the frame of the machine preferably of hollow struct-ure in which the transmission, of belt type, is housed. The frame integrally has a journal hea-d or headstock 2 for supporting and ournalling a spindle 3 and supporting a table 4. The spindle 3 is disposed concentrically within a. journal sleeve 5 which is fixed within a bore in the headstock 2. The upper end of the sleeve is counter-bored to provide seats for the journal ball-bearing 7 and the thrust ball-bearing 8. The upper end of the spindle is flanged to engage with the thrust bearing 8. The lower end of the spindle has a pulley 9 Fixed thereon, the pulley being engaged by a belt 10 travelling over a pair of idler pulleys 11e-11 journalled upon a shaft 12 mounted within the frame. From the idlers the belt eXtenes downwardly to a driving pulley (not shown). The spindle, therefore, is journalled in a vertical position and provided with anti-friction journal and thrust bearings, adapting the same to be run at a high speed. rThe method of support-ing and journalling the spindle in a vertical position, in detail may be variously modified from the disclosure herein and therefore only general reference is made thereto, for any type presenting serviceable machine design may be employed.

The work supporting table l is mounted upon the upper end of the spindle supporting` head, its lower side, at one end, having a depending stem 13 guidingly engaged within a way formed in the rear side of the head, for adjustably supporting the table. The stem and table are sustained in their adjusted position by a lock screw 14 engaged through an oblong slot 15 in the stem and screw-threaded into the head.

The table, centrally, has an opening through which the cutter or routing tool 16 is projected, the tool having a tapered shank for connecting the tool into the upper end of the spindle. The degree at which the rotating tool extends above the plane of. the table governs and gauges the depth of eut. The cutting depth can be varied or changed by adjusting the table vertically relative to the cutter.

As the machine is primarily adapted for recessing the top surface of a wooden heel for shoes with the recess of a. pattern outline corresponding to the outline of the top portion of the heel and for a definite degree insvardly from the edge of the heel to provide a surface margin about the recess, guiding instrumentalities are employed by which the routing can be easily and conveniently accomplished. The guide comprises a plate 17 adjustable in a direction radial with the axis of the cutting tool, the plate 17 at its lower side is recessed into a groove 18 in the table and clamped to the table by a screw 19 engaged through an elongated .slot in the plate and screw-threaded into the table which provides means for adjusting the plate. The

y outline of the work and at a definite degree inwardly from the edge of the work depending upon the spacing adjustment of the guide rollers from'the cutter.

For the particular design of recessing as illustrated in Figure 6, the heel is positioned initially so that the breastedge thereof is irst brought against the cutter with the edge of the heel at the breast line engaging one of the guide rollers. The heel is fed to the cutter while the edge of the heel is maintained in Contact with the guide rollers so that the outline of the heel edge is followed as the cutting progresses. rlhe recess in the particular' instance being open to the breast side of the heel. With the type of cutter as illustrated in Figure 3, the wall of the recess is bevelled or undercut so as to have a dovetailed connection with the part of the shoe engaging into the recess, but it is obvious that various other forms of cutters may be en'iplo-yed as illustrated in dotted lines, Figure 5, representing one form of cutter for cutting a squared edge or wall and, a second, a tapering conversely tovthat shown in full line.

For a safety provision, the cutter is protected by a guard 21 pivotally mounted upon the table, the guard covering or housing the cutter when the work is removed. The guard is swung and controlled by the work and therefore is maintained under a yielding pressure by a spring 22 coiled about the pivot of the guard to automatically swing the guard toward the tool.

Having described my invention, lclaim:

ln a routing machine, a head stock, a spindle ournalled in and extending through said head .stock having a pulley on one end and a cutting tool removably secured into the opposite end, a table disposed transversely to the tool carrying end of the spindle having a stem extending therefrom slidably secured to the head stock, the cutting tool extending through an opening in the table and above the work supporting surface thereof, the table adjustable relative to the cutting tool for governing the cutting depth of the tool, and a guiding member slidably mounted upon said table adjustable relative to the cutting tool and carrying a pair of rollers disposed relatively at opposite sides of the axis of the cutting tool for edge engagement with the work, adapting a face of the work to be routed correspondingly to an outline of the work and within the edge of the work to a degree governed by the spacing of the rollers from the cutting tool.

In witness whereof, I hereunto subscribe my name.

PEARL J. WENTVORTH. 

